2155782 has 8 divisors (see below), whose sum is σ = 4311576. Its totient is φ = 718592.

The previous prime is 2155781. The next prime is 2155793. The reversal of 2155782 is 2875512.

It is a sphenic number, since it is the product of 3 distinct primes.

2155782 is an admirable number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2155781) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 179643 + ... + 179654.

It is an arithmetic number, because the mean of its divisors is an integer number (538947).

2^2155782 is an apocalyptic number.

2155782 is a primitive abundant number, since it is smaller than the sum of its proper divisors, none of which is abundant.

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

2155782 is a wasteful number, since it uses less digits than its factorization.

2155782 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 359302.

The product of its digits is 5600, while the sum is 30.

The square root of 2155782 is about 1468.2581516886. The cubic root of 2155782 is about 129.1818839281.

The spelling of 2155782 in words is "two million, one hundred fifty-five thousand, seven hundred eighty-two".